Reverse-Engineering the Latest iPhone Charger to Create a DIY Portable Battery Pack

Remember the Minty Boost, the DIY battery-powered USB charger for your portable devices that fit neatly in an Altoids tin? It was a decent fix for those constantly failing early iPod batteries, but that 2006 incarnation has had to be updated several times to keep up with the changing architectures of a certain very closed-sourced company's products. Minty Boost recently received yet another DIY update to make it functional with iPhone 3GS. Even better, that update comes with a video showing exactly how to reverse engineer an iPhone charger and create your own backup battery pack.

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